123) A body of mass 20 kg is dropped from a height of 2 m. If g is taken as 10 m/ square second, the kinetic energy of the body, just before striking the ground, will be

124) An accurate ammeter must have a resistance of

125) A shopkeeper says he sells his goods at cost price, but he uses weight of 800 gms instead of 1 kg. Thus he makes a gain of

126) Delhi became the capital of India in the year

127) Lissajous pattern obtained in a CRO depend upon which of the following properties of the two sine waves fed to it?